{
  "manageEntity": {
    "action": "Save",
    "entityId": "222428",
    "entityType": "Track",
    "nonce": "0xc4f56531e6984bb4629b09bc45990e87be708424a837c20c16beea7deb111e5c",
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    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
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}